Mattress innerspring



FIG. 1 is a plan view of the mattress innerspring design of the present invention;

FIG. 2 is a plan view of the mattress innerspring design of FIG. 1 opposite the view of FIG. 1;

FIG. 3 is a side view of the mattress innerspring design of FIG. 1 taken in the direction of the arrows 3--3 in FIG. 1 the opposite side being a mirror image thereof; and,

FIG. 4 is a side view of the mattress innerspring design of FIG. 1, taken in the direction of the arrows 4--4 the opposite side being a mirror image thereof. 

The ornamental design for a mattress innerspring, as shown and described. 